Secomak 643 Direct Drive Blower
A compact direct drive blower with no belts and no maintenance, giving up to 2,100 m³/h and 23 mbar on a 2.2 kW three phase motor at 50 Hz.
At a glance: The Secomak 643 is a direct drive blower with no belts and no bearing assembly, giving up to 2,100 m³/h and 23 mbar at 50 Hz from a 2.2 kW three phase motor. It needs no routine maintenance and suits burner combustion air, air process heaters, cooling, and drying. Hurll Nu-Way supplies and services Secomak blowers in Australia.
No belts and no routine maintenance
The Secomak 643 is a direct drive centrifugal blower: the impeller sits straight on the motor shaft, so there is no belt or bearing assembly to wear out. On an Australian 50 Hz supply it delivers up to 2,100 m³/h of air and up to 23 mbar from a 2.2 kW three phase motor. At 60 Hz it gives up to 2,517 m³/h and 34 mbar, as used in some export equipment.
The 643 is the largest Secomak direct drive blower, moving up to 2,100 m³/h on a 2.2 kW three phase motor. Direct drive blowers pair easily with Secomak air process heaters when hot air is needed.
Only essential components are used, which keeps the blower compact and cost effective and means there is no routine servicing. Secomak has built industrial fans and blowers in the UK since 1930, and every blower is hand built and tested before it leaves the factory.
Key advantages
- No belts and no bearing assembly
- No routine maintenance
- Very compact
- Energy efficient motor
- Pairs with Secomak air process heaters
- Hand built and tested in the UK
Secomak 643 specifications
- Peak flow 2,100 m³/h at 50 Hz, 2,517 m³/h at 60 Hz
- Peak pressure 23 mbar at 50 Hz, 34 mbar at 60 Hz
- Motor 2.2 kW
- Power supply 415 V three phase, 50 or 60 Hz
- Run current 4.6 A three phase
- Weight 34 kg
- Noise level 88 dB(A)
- Max inlet air 40°C standard
- Drive Direct drive, no belt or bearing assembly
Performance by supply frequency
| Supply | Peak flow (m³/h) | Peak pressure (mbar) |
|---|---|---|
| 50 Hz | 2,100 | 23 |
| 60 Hz | 2,517 | 34 |
Figures from Secomak. Australia and New Zealand use 50 Hz.
Secomak 643 datasheets and brochures
Secomak's current datasheet, with the performance curve and dimensional drawing.
Secomak Model 643 1 document
Spare parts and service
Blower spare parts
Impellers and motors for the Secomak 643, sourced through Secomak. Send us the serial number for part numbers and lead times.
Ask about spare partsBlower overhaul and service
Our technicians overhaul and service industrial blowers on site or in our workshop, and commission new installations.
Book a blower overhaulSecomak 643 FAQs
What flow and pressure does the Secomak 643 give?
On a 50 Hz supply, up to 2,100 m³/h of air and up to 23 mbar of pressure. On 60 Hz, up to 2,517 m³/h and 34 mbar. These are the two ends of its performance curve.
Is there a separate 60 Hz model?
No. The 643/50 and 643/60 are the same blower; the figure changes with the supply frequency. Australia and New Zealand use 50 Hz, so the 50 Hz figures apply here. One Secomak datasheet covers both.
What power supply does the 643 need?
A 415 V three phase supply.
Does a direct drive blower need maintenance?
No routine maintenance. With no belt and no separate bearing assembly, there is nothing to adjust. If a motor fails, our technicians can repair or replace it.
Who supplies and services Secomak blowers in Australia?
Hurll Nu-Way, based in Glen Waverley, Victoria, supplies Secomak blowers and gas boosters, and overhauls and services blowers on site or in our workshop. Call 1300 556 380.
Page last updated October 2026.
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